Hoisting apparatus.



PATENTED FEB. 11, 1908.

T. B. WEBSTER. HOISTING APPARATUS. APPLIOATION IILED AUG. 9, 1907.

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v the base and fixed member.

- socket 4 of the base.

THOMAS B. WEBSTER, OF BALTIMORE, MARYLAND.

HOISTING APPARATUS.

Specification of Letters Patent.

Patented Feb. 11, 1908 Application filed August 9. 1907. gerial No. 387-883.

To all whom it may concern:

Be it known that I, THOMAS B. WEBSTER, a citizen of the United States, and a resident of Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a full, clear, and exact description, such as will enable those skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

The invention relates to hoisting apparatus such as is used for lifting dredges on vessels engaged in oyster fishing. In such apparatus the rope to which the dredge is attached leads from the winch over the rail of the vessel. To prevent the rope from chafing and interfering with the movements of the crew a support is provided to elevate the rope above the deck intermediate of the winch and rail.

The present invention has for its object the provision of a hinged rope support that can be raised when the hoisting apparatus is in operation and which can be lowered and turned back out of the way when the apparatus is not in use.

It consists in the novel construction, combination and arrangement of parts, such as will be hereinafter fully described, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings, in which similar reference characters designate corresponding parts, Figure 1 is a side elevation of a rope support embodying the invention, showing the movable member inclined from the perpendicular. Fig. 2 is a front elevation of the same, showing the movable member in an upright position. Fig. 3 is a plan view of Fig. 4 is a plan View of the top of the device.

The base in which the support is mounted comprises the rectangular body part 1 and the flanges 2 projecting from its lower edges. It is reinforced by the ribs 3 projecting from the angles formed by the flanges and the body part. In the body part is the rectangular socket 4. The base is secured to the deck by bolts passing through the openings 5 in the flanges 2. The fixed member or post 6 of the support is of rectangular formation, preferably of solid Wood, and is seated in the It is firmly held in place by the bolts 7 passing through its lower end and the walls of the base. By reason of the rectangular formation of the fixed member and its socket in the base any tendency that the support may have to turn or twist is prevented. The movable member 8 of the support is formed of sheet metal bent to form the parallel legs 9 connected at their upper ends by the cross-piece 10. The width of the metal is the same as that of the fixed member and its thickness is suificient to give the required strength. The movable member straddles the fixed member and the two are pivoted together by the bolt 11 passing through their lower parts. The fixed meme ber projects a considerable distance between the legs of the movable member. Bolts 12 pass through the upper part of the fixed member and the central part of the movable member, and hold the latter firmly in an upright position. The bolts 12 are on the same level and are spaced apart so as to prevent twisting of the movable member. Asthere is considerable distance between the pivot 11 and-the bolts 12 there is considerable leverage at the lower end of the movable member to hold the latter against the strain of the dredge on the rope.

In the recess in the upper end of the movable member 8 is the sheave 13 j ournaled on the bolt 14 passing through the ends of the legs 9. Between the sheave and the crosspiece 10 there is sufficient s ace to permit the rope to play back and fort across the same. At the ends of the sheave and on opposite sides of the same are the antifriction rolls 15 journaled at their ends in bearings in the ends of the straps 16 riveted to the inner faces of the legs 9. These rolls prevent the rope from binding or chafing on the edges of the movable member.

The support is mounted on the deck of the vessel between the rail and the winch for winding the rope to the end of which the dredge is attached. The outboard end of the rope passes around a pininserted in the rail of the vessel. The rope passes from the winch over the sheave of the support and around the pin in the rail and trails the dredge over the side of the vessel. The support holds the rope clear of obstruction on the deck of the vessel and permits the crew to pass beneath the same. When the support is not in use, by removing the bolts 12 the movable member can be turned inboard out of the way.

Having thus described my invention,

what I claim and desire to secure by Letters Patent is, I

1. In a rope support for hoisting apparatus, a fixed post, a movable member of sheet metal shaped to form parallel legs with a recess at their upper ends and mounted astrid'e of said post, a bolt pivoting said legs to said post, removable means for securing said legs to said post when the movable member is upright, and a sheave journaled in the recess of said movable member.

2. In a rope support for hoisting apparatus, a base comprising a rectangular body part and flanges projecting from the same and having a rectangular socket, a fixed member secured in said socket, a movable member comprising parallel legs straddling said fixed member and pivoted at their lower ends to the lower part of said fixed member, means for securing said movable member when in an upright position to the upper part of said fixed member, and a sheave journaled in the upper end of said movable member.

3. In a rope support for hoisting appara tus, a fixed member, a movable member comprising parallel legs straddling said fixed member and pivoted at their lower ends to the lower part of said fixed member, means for securing said movable member in an upright position on said fixed member, a sheave journaled in the upper end of said movable member, and antifriction rolls mounted on said movable member at the ends and on opposite sides of said sheave.

4. In a r0 e support for hoisting apparatus, a fixe post, a movable member of sheet metal shaped to form parallel legs with a recess at their upper ends and mounted to straddle said 0st, a bolt pivoting the lower ends of said legs to the lower part of said post, removable means for securing said legs to the upper part of said post when the movable member 1s upright, and a sheave journaled in the recess of said movable member. h

5. In a re e su ort for oisting a a ratus, a fixed post z a movable membe i' Of sheet metal shaped to form parallel legs with arecess at their upper ends and mounted to straddle said post, a bolt pivoting the lower ends of said legs to the lower part of said post, a removable bolt for securing said legs to the upper part of said post when the movable member is upright, a sheave journaled in the recess of said movable member,- and an antifriction roll mounted on said movable member adjacent to an end of said sheave.

In testimony whereof I hereunto aifix my signature in the presence of two witnesses.

THOMAS B. WEBSTER.

Witnesses:

ISAAC BOZMAN, JOHN A. BOYD. 

